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Marangoni-Benard对流超临界转捩过程的实验研究
吴笛; 段俐; 康琦
Source Publication第九届全国实验流体力学学术会议论文集(上册)
2013
Pages199-206
Conference Name第九届全国实验流体力学学术会议
Conference Date2013-07-06
Conference Place中国浙江杭州
AbstractMarangoni-Benard对流是指一个上方具有自由表面下方加热的液体薄层,当上下温差超过临界值时,流体失稳流动。本文通过实验研究超临界流动的转捩过程,液层温差超过临界值后继续加温,观察流动由定常向非定常,并向湍流发展的转捩途径。由于Marangoni-Benard对流存在速度场和温度场的耦合,因此实验中采用了多种实验手段相结合,通过粒子图像测速法(PIV)和多普勒测速仪(LDV)相结合,观测流动速度场,通过红外热像仪和热电偶相结合,对流的温度场。定常情况下,实验得到了一次失稳的六边形对流结构和二次失稳的四边形对流结构,以及在弱超临界条件下,波数随超临界数的变化。在非定常情况下,观查到了涡...
KeywordMarangoni-benard对流 超临界流动 非定常 热流体波 亚涡胞结构
DepartmentNML微重力实验流体力学
Language中文
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48387
Collection国家微重力实验室
Recommended Citation
GB/T 7714
吴笛,段俐,康琦. Marangoni-Benard对流超临界转捩过程的实验研究[C]第九届全国实验流体力学学术会议论文集(上册),2013:199-206.
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